John P. Nyhan

“I had extensive private industry experience before becoming an attorney. That expertise, along with my academic and legal training, provide a unique perspective that helps me better understand the issues my clients face as they operate their businesses. My overriding goal is to secure fair and reliable property tax outcomes that support their bottom line.”

John P. Nyhan represents a variety of clients in state and local property tax, valuation and planning matters. Prior to joining O’Keefe Lyons & Hynes, John was Chief of Staff at the Board of Review for Cook County, a quasi-judicial real estate tax tribunal, where property owners appeal valuations set by the Assessor. In addition to supervising day-to-day operations, John acted as the Board’s senior hearing officer, resolving complex commercial and industrial property valuation claims.

Prior to working at the Board of Review, John represented the Cook County Assessor’s Office, including as its Chief Legal Counsel. John served on the Assessor’s Executive Committee with oversight responsibility for several departments within the office.

“In government, I worked with professionals who were committed to equitable and reasonable outcomes for property owners. My colleagues at O’Keefe, Lyons & Hynes exhibit the same dogged determination to achieve a fair, reasonable and just result for the clients we serve.”